noob question

[dub599]

i built my first 2 lasers last night. a red one and a blue ray. the red one works fine but the blue one doesnt do anything. ive check the pin outs and everything is wired right. i bought a pailide kit from morehnberg with a preset driver at 120ma . when i first turned on the blue ray it lit up for about half a second and then nothing. im oretty sure i burnt out the diode. but my question is.. is do blue ray diodes still light up a little after burnt out like a red one or do they just die out?

 

[pullbangdead]

i built my first 2 lasers last night. a red one and a blue ray. the red one works fine but the blue one doesnt do anything. ive check the pin outs and everything is wired right. i bought a pailide kit from morehnberg with a preset driver at 120ma . when i first turned on the blue ray it lit up for about half a second and then nothing. im oretty sure i burnt out the diode. but my question is.. is do blue ray diodes still light up a little after burnt out like a red one or do they just die out?

They can do either: either turn LED, or go completely out.

 

[Mohrenberg]

is the "spacer" in the flashlight?
look at where the heatsink sits at the tip of the head of the flashlight, and press down on the heatsink to see if there is any gap between the heatsink and the lip where the heatsink would stop, the heatsink came up short so a spacer (either a washer or simply a piece of insulated wired curved into a ring) is put between the heatisnk and the black pill containing to fill in this gap, everything has to be snug in there otherwise the blank pcb won't get force down onto the rim of the handle to complete the negative contact.

 

[dub599]

yea the spacer is in the flashlight, i read in one of the threads that this might have been the problem so i even tried using thicker pieces of insulated wire also and nothing. just that first half second of it working and then nothing. kinda sucksi think the driver might have accidentally been set too high, but im scared to buy another diode and blow it if the driver is set too high

 

[jeffd]

What driver are you using and how are you powering it? You may not be giving it enough voltage

 

[bobhaha]

are you sure your solders are strong and secure to the diode and to the driver, if for a second you get a spike between driver and diode.. say bye bye.. btw im guessing the host has click on off tail cap.. if not, did you add the button between the battery and driver or between the driver and diode? if you did it between the driver and diode thats your problem.. btw my first ever blu-ray lasted 5 mins, before the solder cracked, spiked and killed the diode, it never LED'ed just died completely..

Hope that helped -Adrian

 

[dub599]

i used this host, it came with a flexdrive v4 preset to 120ma
http://laserpointerforums.com/f39/fs-pailide-laser-kit-41596.html
and then i bought a phr-803t premounted and wired in a focusable aixis module, i just matched the positives and the grounds. im pretty good at soldering electronics and everything looks good. i even thought the same thing earlier this afternoon and took it all apart and resoldered all joints and nothing.

from what i read the forward voltage for the diode is 5v, is it correct that i can connect a 5v power source 100ma or under to the diodes pins to check if it works?

 

[jeffd]

What kind of battery are you using? If its rechargeable is it charged fully?

 

[dub599]

yes it is a freshly charged 14500 AA ultrafire lithium battery, i have a bunch and none make the blue ray work but they all work fine on the red laser